AU2004282533B2

AU2004282533B2 - Door edge construction

Info

Publication number: AU2004282533B2
Application number: AU2004282533A
Authority: AU
Inventors: Gary F. Bartlett; Wendy Duckham
Original assignee: EMEH Inc
Current assignee: EMEH Inc
Priority date: 2003-10-14
Filing date: 2004-10-07
Publication date: 2010-09-16
Anticipated expiration: 2024-10-07
Also published as: MY146577A; WO2005038182A2; US20050076593A1; US7621102B2; AU2004282533A1; PL1680568T3; US20070101655A1; HK1091882A1; TWI381092B; US7587876B2; US20070113521A1; EP1680568A4; WO2005038182A3; US7775013B2; EP1680568A2; TW200519281A; EP1680568B1

Description

C-\4RPonbl\DCC\GAV\3143392 iDOC-25 /2010 DOOR EDGE CONSTRUCTION This application claims priority to U.S. Serial No. 10/686,325 filed October 14, 2003 entitled "Door Edge Construction". 5 The present invention relates generally to door edge constructions which include replaceable or non-permanently secured components. One popular form of vertically hung doors typically comprises a wooden frame defining outer dimensions of the door, panels of sheet material, such as plywood, plastic or metal covering the frame or both sides, and a core within the frame, which may be solid or 10 hollow. In certain high traffic environments, for example, schools, hospitals and other types of health care institutions, doors are often subjected to impacts from carts, wagons, dollies, etc. which take their toll on the doors, particularly along their free edges and the hinged edges. Nicks, gouges and cracks produced along door edges by such impacts compromise a 15 door's ability to effect a secure closure, which is particularly important where the door serves as a fire barrier as well as a closure, and mar its aesthetic appearance. When a door edge was severely damaged, it is typically necessary either to replace the door in its entirety or to refinish it. With the latter expedient, the door panels may also have to be replaced and, in any event, the door will have to be refinished as well. The cost 20 of maintaining the structural integrity and appearance of the many doors in a hospital, for example, can become substantial. According to a first aspect of the present invention, there is provided an edge construction for a door, the door having a first edge and a second edge, the edge construction comprising a core member, a first stile member permanently attached to the 25 core and a second stile member adjacent to the first stile member, the second stile member being replaceable, a gap defined between the first stile member and the second stile member and a cover having outer edges disposed over at least part of the second stile member, the outer edges being disposed in the gap and spaced from the first stile member to define an exposed surface. 30 According to a second aspect of the present invention, there is provided a rectangular door having opposing panels, a width defined therebetween, and vertical edges, C \NRPortbI\DCC\CAA3143392_ IDOC.25/O8/O2O -2 an edge construction for a vertical edge of the door comprising a first stile member permanently attached to the vertical edge, the first stile member including a longitudinal groove formed in an outer surface thereof, a second stile member adjacent to the first stile member, the second stile member being replaceable and having a longitudinal spline, the 5 spline mating with the groove in the first stile member to form a tongue-and-groove coupling between the first stile member and the second stile member, a gap defined between the first stile member and the second stile member and a cover having outer edges, the cover being disposed over at least part of an outer surface of the second stile member, the outer edges of the cover being disposed in the gap and spaced from the first 10 stile member to define an exposed surface therebetween. According to a third aspect of the present invention, there is provided a door edge construction comprising a core member, a first stile member permanently attached to the core, a second stile member adjacent and exterior to the first stile member, the second stile member extending along a length of the first stile member, the second stile member being 15 non-permanently secured to the first stile member such that it is readily removable and replaceable, the second stile member including indents formed on opposite sides thereof, the indents extending longitudinally along a length of the first stile member and a cover having inwardly directed flanges, the cover being disposed over at least part of an outer surface of the second stile member, the inwardly directed flanges being received within the 20 indents in the second stile member. Preferred embodiments of the present invention minimize the necessity of replacing or refinishing doors that have been severely damaged along their edges by enabling a damaged door edge to be simply and inexpensively restored. Preferred embodiments of the invention provide a door with a replaceable edge 25 strip which, when damaged, can be readily removed and replaced with a new one, thereby restoring the door's integrity and appearance. This is achievable by so constructing the door such that the replaceable edge strip or the replaceable stile can be removed and replaced without affecting the door frame or door slab, thus eliminating the need for otherwise replacing or refinishing the door. The stile may be so configured that it can be 30 covered with a plastic cap that provides an extra layer of protection against damage and helps maintain a snug seal against a doorway or an opposite door.

C NRPonb\DCOGAV\3143392_l.DOC.253A)W2010 -3 A preferred embodiment of the invention incorporates in a replaceable door edge assembly an intumescent (heat expanding) material such that in case of fire, the edge is expanded outwardly to effect a tighter seal with the surrounding doorway or opposite door. The fire safety rating of the door can thus be improved. 5 A preferred embodiment of the invention incorporates in a door edge construction an accent material to provide a reveal, or line of color different than the door panel color, for aesthetic and/or identification purposes. The present invention will now be described, by way of non-limiting example only, with reference to the accompanying drawings, in which: 10 FIG. I is an oblique view partially cut away, of a door incorporating a preferred embodiment of the present invention; FIG. 2 is a cross-section of the door of FIG. 1, taken along the line 2-2; FIG 3 is an enlarged view of the right-hand portion of the cross-section view of FIG. 2 showing the door edge construction in greater detail; 15 FIGS. 4A, 4B and 4C illustrate modifications of the door edge construction of FIG. 3; FIG. 5 is an enlarged cross-sectional view similar to FIG. 3 illustrating the incorporation of an intumescent strip in a door edge construction embodying the invention; FIG. 6 illustrates a modification of the door edge construction of FIG. 5; 20 FIGS. 7A, 7B, 7C and 7D illustrate a replaceable door edge construction embodying the invention incorporating various types of accent strips or reveals; FIGS 8A and 8B illustrate variations embodying the invention incorporating an alternate tongue and groove arrangement for securing the replaceable stile to the door edge; 25 FIG. 9 illustrates a variation embodying the invention in which the tongue and groove members are covered with metal channels; FIG. 10 illustrates a modification of the arrangement of FIG. 9; FIGS. 11 and 12 illustrate variations of the arrangement of FIG. 9; and FIG. 13 illustrates a replaceable stile arrangement in accordance with a preferred 30 embodiment of the invention in which the width of the replaceable stile is adjustable. Turning now to the drawings, in particular FIGS. 1,2 and 3, a door of the type CkNRPonbl\OCC\GAV143392 I.DOC-235V2W10 -4 commonly used in health care facilities and the like, but incorporating the present invention, is shown. Such a door 20 typically comprises vertical stiles 22 and top and bottom rails 24, surrounding a core 26. The stiles 22 and rails 24 preferably are made of hardwood and the core 26 of particle board, although other materials may be used to 5 provide the necessary strength and rigidity. Finish panels 28 cover the particle board core, top and bottom rails and stiles on both sides to provide strength, impact resistance and aesthetic appeal. As seen best in FIG. 3, the panels 28 may comprise a hardboard layer 28a covered by a decorative plastic cladding 28b such as of ACROVYN1, a vinyl acrylic plastic manufactured by 10 Construction Specialties, Inc., Lebanon, NJ. The layers 26,28a and b are laminated together to form a 5-ply construction. Doors of the type illustrated are manufactured, for example, by Jeld-Wen, Inc. Doors 20 may be made in dimensions to fit various size doorways in which they are mounted. As will be appreciated, the door 20 may be hinged to swing around along either 15 vertical edge to suit the application. In a typical installation often found in health care facilities, a pair of such doors are hinged at opposite edges to close a wide hallway and are swingable in both directions so that rolling beds, carts, etc may be pushed through without the need to hold the door open. As discussed above, such doors are subjected to repeated, severe impact by beds, 20 carts, etc. , as they are pushed through the doors, often resulting in significant damage to the free vertical edges of the doors. Not only is the appearance of the door thus marred, the integrity of the closure and its fire resistance capability are degraded. In the case of significant edge damage, it has in the past been necessary to completely replace a damaged door with a new one to restore the closure's appearance and integrity, at substantial cost. 25 The vertical edges of a door such as described herein are fabricated with separable edge assemblies that can be readily replaced if damaged, thereby avoiding the necessity of complete door replacement and greatly reducing the cost of restoring the door's appearance and integrity. A removable door edge arrangement of a preferred embodiment of the invention is 30 shown in FIGS. 1, 2 and 3; most clearly in the enlarged section through a door edge of FIG. 3. The vertical door stile is indicated at 22 and the replaceable edge assembly C\NRPonbKDCC\GAVk1I4U92_I DOC-25/0/2010 -5 indicated at 30. The latter comprises replaceable stile 32, preferably of hardwood, extending the full length of the edge stile 22 and a plastic cover 34 secured over replaceable stile 32. Stile 22 is milled with a longitudinal tapered groove 22a and replaceable stile 32 with a longitudinally extending complementary tapered spline 32a, 5 forming a snug tongue-and-groove mating of stile 22 and replaceable stile 32. A plurality, e. g. , 4, of screws 36, spaced along the door edge, firmly but releasably secure replaceable stile 32 to stile 22. If desired, spots of glue may also be applied between stile 22 and replaceable stile 32 to more firmly hold them together, while still allowing replaceable stile 32 to be removed when required. 10 Cover 34 may be formed of ACROVYN* or other relatively hard but resilient material, such as aluminum or stainless steel, with inwardly directed flanges 34a along both edges. Cover 34 is formed to be of the same shape as the outer surface of replaceable stile 32, e.g., generally rectangular with rounded corners. Replaceable stile 32 is provided with rectangular indents 32b along both inner longitudinal edges, such that when stile 22 15 and replaceable stile 32 are joined, rectangular grooves 32b are formed therebetween extending the full length of the door. These grooves snugly receive the flanges 34a of cover 34. To remove a damaged cover from a door, one of the flanges 34a is pried out of its groove and the cover bent away to release the other flange. To install a new cover, one of the flanges is inserted into its groove and the cover pressed toward the outer surface of 20 replaceable stile 32 until the other flange snaps into the other groove. It will be understood that the curvature of the corners of the stile and cover combination discussed and illustrated may be varied to suit the particular application. For example, for paired swinging doors, such as often found across hospital passageways, the comer curvature will be of greater radius than single doors, to provide the required 25 clearance. It will also be understood that the cover 34 need not be removable, but may be permanently secured to its replaceable stile 32, such as by a suitable adhesive. In such an arrangement, flanges 34a and indents 32b may be unnecessary. FIGS. 4A, 4B and 4C illustrate alternative forms of the tongue-and-groove 30 coupling of FIG. 3, with the screws omitted for the sake of clarity. In FIG. 4A, a dovetail spline 42 mates with a corresponding groove 44; in FIG 4B, the spline 46 has a partially C kNRPortbiDCC\GAA1 l4119l DOC-25/OI/20lI - 5A circular cross-section to mate with a partially circular groove 48; and in FIG. 4C, the spline 50 and groove 52 are rectangular in cross-section. It will be understood that other variations of the tongue-and-groove cross-sections may be used as desired. FIG. 5 illustrates another embodiment which further enhances possible fire 5 resistance advantages of doors incorporating embodiments of the invention. A heat expansion or intumescent strip 52 extends the full length of the door edge and is adhered in a groove 54 milled along the outer edge of replaceable stile 32. Cover 34 may have a complementary groove along its inner surface to accommodate the strip as well. The strip 52 is covered by outer cover 34 when the latter is snapped in place. At normal room 10 temperatures, strip 52 maintains its normal thickness. In case of fire or extreme heat adjacent the door, strip 52 expands, pushing cover 34 outwardly to tighten the seal between the edge of the door and an adjacent door or doorframe, thus increasing the fire resistance rating of the door.

WO 2005/038182 PCT/US2004/033394 between the edge of the door and an adjacent door or doorframe, thus increasing the fire resistance rating of the door. A variation of the arrangement of FIG. 5 is illustrated in FIG. 6 wherein the intumescent strip 52 is adhered in a groove 34a formed in the outer edge 5 of cover 34, the inward extension of the cover 34 fitting in a groove milled along the outer edge of replaceable stile 32. It will be understood that in the embodiments of FIGS. 5 and 6, any of the tongue-and-groove couplings described above may be used in place of the configurations illustrated. 10 To improve the appearance of the door, an accent strip or reveal, of a contrasting or complementary color to the remainder of the door surface, may be incorporated in the door edge arrangements of FIGS. 3 to 6. In the embodiment of FIG. 7A, longitudinal grooves 60 are milled along opposite sides of replaceable stile 32, inwardly of its interior face, for receiving the flanges 34a of cover 34, leaving 15 exposed narrow longitudinal surfaces 62 on opposite sides of the stile, between cover 34 and the panels 28. These exposed surfaces 62 may be painted in any aesthetically pleasing color. The reveal or accent strip may also be provided by insertion of a suitably colored strip of accent material in a slot provided between the stile 22 and 20 replaceable stile 32, as shown in FIG. 7B. As seen, stepped indents 64 are provided along each inner corner of replaceable stile 32 to receive the flanges of cover 34 and accent strips 66. The strips 66 may be of PVC plastic, aluminum, stainless steel or other material having their outer surfaces ridged and slightly thicker than the grooves created upon joinder of replaceable stile 32 to stile 22. The strips 66 are pressed into 25 the grooves after cover 34 is inserted and the ridged surfaces resist any tendency of the strips to move out of the grooves. A variation of the accent strip of FIG. 7B is illustrated in FIG. 7C. In this modification, the inside longitudinal edges of replaceable stile 32 are milled to provide both stepped indents and longitudinal grooves for receiving L-shaped accent 30 strips 68. One leg of each accent strip extends outwardly to just below the respective outer surface of the door with its edge exposed when replaceable stile 32 is joined to stile 22 with the accent strip in place. 6 WO 2005/038182 PCT/US2004/033394 In the embodiment of FIG. 7D, the accent strips comprise opposite exposed edges 70 of a strip 72 sandwiched between stile 22 and replaceable stile 32. The accent strips of FIGS. 7B-D may be made of any suitable material, including PVC plastic, aluminum and stainless steel. 5 FIGS. 8A and 8B illustrate variations of the tongue and groove arrangements of the invention shown in the previous embodiments. In both variations, the groove in the stile 22 is rectangular (as in FIG. 4C) and lined with a U shaped channel 80 having longitudinal ridges 82 formed along both interior sides of the channel. Channel 80 is secured in the rectangular groove milled in stile 22 by 10 screw 84. Adhered along the inner surface of replaceable stile 32 is a tongue plate 86 having integral longitudinal extending flanges 88 with longitudinally extending ridges 90 formed along their outer surfaces. The pair of flanges 88 and channel 80 are dimensioned such that the flanges are snugly received within the 15 channel and the respective ridges 82, 90 engaged to secure replaceable stile 32 to stile 22. Tongue plate 86 may extend the full width of stile 32, with rounded edges extending slightly beyond the door panel as in FIG. 8A, or be narrower than the width of the stile and received in a depression milled in the inner surface of replaceable stile 32, as in FIG. 8B. In the embodiment of FIG. 8A, the rounded extensions of the 20 tongue plate 86 may serve as accent strips. In FIG. 8B, accent strips are provided by inserts 92 between the edges of cover 34 and stile 22. In both embodiments, intumescent strips 52 may be provided. Channel 80 and tongue plate 86 may be made of aluminum or other metal or plastic, as desired. 25 In the embodiment of FIG. 9, a dovetail tongue and groove coupling between stile 22 and replaceable stile 32 with screw 36, such as shown in FIG. 4A, has both tongue 94 and groove 96 covered with channels of thin aluminum, steel, or other material providing low friction slideable surfaces, 98a and 98b, respectively, which extend to the outer surfaces of the door. The covered channels facilitate the 30 insertion and removal of replaceable stile 32 on stile 22. A variation of the embodiment of FIG. 9 is shown in FIG. 10, in which the extents of the metal channels 100a and 100b are limited to the extents of the groove and tongue, respectively. This variation of the embodiment includes cover 34 7 C.NRPorbl\DCC\GAVUI43392_ .DOC-25910/2010 -8 and may include intumescent strip 52. The space left between stile 22 and replaceable stile 32 is filled with tapered inserts 102, which serve to wedge the members 22,32 apart and also to provide accent strips. In FIG. 11, a single metal channel 110 is applied to the dovetail tongue element 5 only and in FIG. 12, the single metal channel 112 is extended outwardly between stile 22 and replaceable stile 32 to the door faces with rounded outer edges 114 which provide accent strips. To accommodate different door thicknesses, the adjustable width replaceable stile of FIG. 13 is advantageous. In this embodiment, the replaceable stile is made up of two 10 separate longitudinal elements 132a and 132b, each having a generally L-shaped cross section overlying and nesting with each other to be slideable away from each other between a minimum width arrangement wherein the respective longitudinal edges of elements 132a and 132b are in contact with each other and a maximum width configuration wherein the respective longitudinal edges are separated. Opening 134 is of 15 greater diameter than screw 36 to allow for varying amounts of separation. It will be seen from the foregoing that preferred embodiments of the present invention provide a simple, inexpensive way of repairing damaged doors by allowing replacement only of a removable door edge assembly, thereby saving the considerable exposure of replacing an entire door. Although a number of specific embodiments of the 20 invention above have been illustrated, various modifications thereof will be apparent to those skilled in the art within the spirit of the invention. For example, replaceable stile 32 and cover 34 may be made as a single integral member and joined to stile 22 as shown. Also, the tongue-and-groove coupling between replaceable stile 32 and stile 22 may be eliminated, if desired and any of these variations may be provided with or without 25 intumescent strips. Accordingly, it will be evident that the scope of the invention is to be limited only as set forth in the appended claims. Throughout this specification and the claims which follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" and "comprising", will be understood to imply the inclusion of a stated integer or step or group 30 of integers or steps but not the exclusion of any other integer or step or group of integers or steps.

C\NRPorbl\DCC\GA\3143392_I.DOC-25MW210 -9 The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general 5 knowledge in the field of endeavour to which this specification relates.

Claims

1. Edge construction for a door, the door having a first edge and a second edge, the edge construction comprising: 5 a core member; a first stile member permanently attached to the core; and a second stile member adjacent to the first stile member, the second stile member being replaceable; a gap defined between the first stile member and the second stile member; and 10 a cover having outer edges disposed over at least part of the second stile member, the outer edges being disposed in the gap and spaced from the first stile member to define an exposed surface.

2. In a rectangular door having opposing panels, a width defined therebetween, and 15 vertical edges, an edge construction for a vertical edge of the door comprising: a first stile member permanently attached to the vertical edge, the first stile member including a longitudinal groove formed in an outer surface thereof; a second stile member adjacent to the first stile member, the second stile member being replaceable and having a longitudinal spline, the spline mating with the groove in the 20 first stile member to form a tongue-and-groove coupling between the first stile member and the second stile member; a gap defined between the first stile member and the second stile member; and a cover having outer edges, the cover being disposed over at least part of an outer surface of the second stile member, the outer edges of the cover being disposed in the gap 25 and spaced from the first stile member to define an exposed surface therebetween.

3. An edge construction according to claim 1 or 2, wherein the outer edges of the cover are disposed in contact with a portion of the first stile and the second stile. 30

4. A door edge construction comprising: a core member; C:\NRPonblDCC\GAV\I41392_I DOC-25mU/2lIII - 11 a first stile member permanently attached to the core; a second stile member adjacent and exterior to the first stile member, the second stile member extending along a length of the first stile member, the second stile member being non-permanently secured to the first stile member such that it is readily removable 5 and replaceable, the second stile member including indents formed on opposite sides thereof, the indents extending longitudinally along a length of the first stile member; and a cover having inwardly directed flanges, the cover being disposed over at least part of an outer surface of the second stile member, the inwardly directed flanges being received within the indents in the second stile member. 10

5. An edge construction according to claim 4, wherein the flanges are disposed at the edges of the cover.

6. An edge construction according to claim 4, wherein the first stile member has a 15 groove to receive a spline of the second stile member.

7. An edge construction according to any one of the preceding claims, further comprising at least one accent strip. 20

8. An edge construction according to claim 7 as appended to any one of claims 1, 4, 5 and 6, including opposing panels and a width defined therebetween, wherein the accent strip is configured as a unitary member extending across the width of the door edge.

9. An edge construction according to claim 7 as appended to claim 2 or according to 25 claim 8, wherein the or each accent strip is of a color different from the color of at least the panels or the cover of the door.

10. An edge construction according to any one of claims 7 to 9, wherein the or each accent strip is a unitary member extending across the width of the door. 30 C\NRPortbl\DCC\GAV3I43392 DOC-25/A8/2010 - 12

11. An edge construction according any one of claims 7 to 10, wherein the or each accent strip is of a color different from the color of at least the cover or a remainder of the door. 5

12. An edge construction according to any one of claims 7 to 11, wherein the or each accent strip is disposed between the cover and the first stile member.

13. An edge construction according to claim 12, wherein the or each accent strip is disposed in a slot formed between the first stile member and the cover. 10

14. An edge construction according to claim 13, wherein the slot is formed in the second stile member.

15. An edge construction according to claim 13 or 14, wherein the or each accent strip 15 is an L-shaped member.

16. An edge construction according to claim 15, further comprising a lateral slot formed in the second stile member, wherein the L-shaped member includes a first edge received by the slot disposed between the first stile member and the cover and a second 20 edge received in the lateral slot.

17. An edge construction according to claim 7 as appended to any one of claims 4 to 6, wherein the or each accent strip is disposed between the cover and the first stile member and sandwiched between the first and second stile members such that the accent strip 25 includes at least one exposed surface.

18. An edge construction according to claim 7 as appended to either one of claims I and 2, wherein the or each accent strip is disposed between the cover and the first stile member. 30 C NRPorblDCC\GAV3 143392 1 DOC-25Af/2010 - 13

19. An edge construction according to claim 17 or 18, wherein the or each exposed surface is of a color different from at least the cover or a remainder of the door.

20. An edge construction according to any one of claims 7 to 19, wherein the or each 5 accent strip is composed of plastic or metal.

21. An edge construction according to any one of the preceding claims, comprising a non-permanent fastening means releasably securing the second stile member to the first stile member. 10

22. An edge construction according to any one of claims I to 20, wherein an adhesive couples the first stile member to the second stile member.

23. An edge construction according to any one of the preceding claims, wherein the 15 cover is removable from the second stile member.

24. An edge construction substantially as hereinbefore described with reference to the accompanying drawings.